Home / 1,720.83-2,581.20-422.30

Finding the Fourth Proportional to 1,720.83, 2,581.20 and 422.30

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Solution

The fourth proportional to 1,720.83, 2,581.20 and 422.30 is: 633.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,720.83 : 2,581.20 = 422.30 : x
  2. Step 2: Convert to fraction form
    1,720.83/2,581.20 = 422.30/x
  3. Step 3: Cross multiply
    1,720.83x = 2,581.20 × 422.30
  4. Step 4: Simplify right side
    1,720.83x = 1,090,027.85
  5. Step 5: Solve for x
    x = 1,090,027.85/1,720.83
  6. Step 6: Final answer
    x = 633.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.